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Portone A, Borrego-Varillas R, Ganzer L, Di Corato R, Qualtieri A, Persano L, Camposeo A, Cerullo G, Pisignano D. Conformable Nanowire-in-Nanofiber Hybrids for Low-Threshold Optical Gain in the Ultraviolet. ACS NANO 2020; 14:8093-8102. [PMID: 32419446 PMCID: PMC7393628 DOI: 10.1021/acsnano.0c00870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/08/2020] [Indexed: 05/08/2023]
Abstract
The miniaturization of diagnostic devices that exploit optical detection schemes requires the design of light sources combining small size, high performance for effective excitation of chromophores, and mechanical flexibility for easy coupling to components with complex and nonplanar shapes. Here, ZnO nanowire-in-fiber hybrids with internal architectural order are introduced, exhibiting a combination of polarized stimulated emission, low propagation losses of light modes, and structural flexibility. Ultrafast transient absorption experiments on the electrospun material show optical gain which gives rise to amplified spontaneous emission with a threshold lower than the value found in films. These systems are highly flexible and can conveniently conform to curved surfaces, which makes them appealing active elements for various device platforms, such as bendable lasers, optical networks, and sensors, as well as for application in bioimaging, photo-cross-linking, and optogenetics.
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Affiliation(s)
- Alberto Portone
- NEST,
Istituto Nanoscienze-CNR, Piazza S. Silvestro 12, I-56127 Pisa, Italy
- NEST,
Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy
- Dipartimento
di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, Via Arnesano, I-73100 Lecce, Italy
| | - Rocio Borrego-Varillas
- IFN-CNR,
Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
| | - Lucia Ganzer
- IFN-CNR,
Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
| | - Riccardo Di Corato
- Institute
for Microelectronics and Microsystems, CNR-IMM, Campus Ecotekne, Via Monteroni, I-73100 Lecce, Italy
| | - Antonio Qualtieri
- Center
for Biomolecular Nanotechnologies, Istituto
Italiano di Tecnologia, Via Barsanti, I-73010 Arnesano, Italy
| | - Luana Persano
- NEST,
Istituto Nanoscienze-CNR, Piazza S. Silvestro 12, I-56127 Pisa, Italy
- NEST,
Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - Andrea Camposeo
- NEST,
Istituto Nanoscienze-CNR, Piazza S. Silvestro 12, I-56127 Pisa, Italy
- NEST,
Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - Giulio Cerullo
- IFN-CNR,
Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
| | - Dario Pisignano
- NEST,
Istituto Nanoscienze-CNR, Piazza S. Silvestro 12, I-56127 Pisa, Italy
- Dipartimento
di Fisica, Università di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy
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2
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ZnO micron rods as single dielectric resonator for optical sensing. Anal Chim Acta 2020; 1109:107-113. [DOI: 10.1016/j.aca.2020.03.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 01/11/2023]
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3
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Zhang N, Ding F, Yu S, Zhu K, Li H, Zhang W, Liu X, Xu Q. Novel Research Approach Combined with Dielectric Spectrum Testing for Dual-Doped Li 7P 3S 11 Glass-Ceramic Electrolytes. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27897-27905. [PMID: 31298523 DOI: 10.1021/acsami.9b08218] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Owing to the expanding function of Li-ion transmission channels, it is important to explore the doping effects of different compounds into sulfide solid electrolytes to improve their electrochemical performances. However, it is hard to characterize the doping behaviors within sulfide solid electrolytes with low crystallinity and poor stability just by conventional crystallography analytical methods. In this work, the dielectric spectrum testing combined with other analytical methods, such as 7Li solid-state nuclear magnetic resonance, X-ray photoelectron spectroscopy, and the electrochemical method, have been applied to investigate the dual-doping behaviors of WS2 and LiBr within Li7P3S11 glass-ceramic electrolytes. This research method can not only evaluate the internal acting effect between the skeleton of sulfide solid electrolytes and the migrating kinetics of Li ions but also explore the capacitance at the interfaces of LiCoO2/sulfide solid electrolytes. The experimental results show that the number of Li ions with fast transport velocity within Li2S-P2S5-based solid electrolytes has been increased. Meanwhile, the interfacial capacitances between Li2S-P2S5-based solid electrolytes and the LiCoO2 cathode have decreased after dual-doping of WS2 and LiBr, indicating a synergetic effect for the doped Li7P3S11 glass-ceramic electrolytes in terms of the ionic conductivities and interfacial compatibilities. This work may provide a novel analytical approach to explore both the diffusion kinetics and interfacial behaviors for the solid electrolytes of lithium batteries.
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Affiliation(s)
- Nan Zhang
- National Key Laboratory of Science and Technology on Power Sources , Tianjin Institute of Power Sources , Tianjin 300384 , P. R. China
| | - Fei Ding
- National Key Laboratory of Science and Technology on Power Sources , Tianjin Institute of Power Sources , Tianjin 300384 , P. R. China
| | | | | | - Huan Li
- School of Chemical Engineering , The University of Adelaide , Adelaide 5005 , South Australia
| | | | - Xingjiang Liu
- National Key Laboratory of Science and Technology on Power Sources , Tianjin Institute of Power Sources , Tianjin 300384 , P. R. China
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4
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Maurya MR, Toutam V. Fast response UV detection based on waveguide characteristics of vertically grown ZnO nanorods partially embedded in anodic alumina template. NANOTECHNOLOGY 2019; 30:085704. [PMID: 30592259 DOI: 10.1088/1361-6528/aaf545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Zinc oxide (ZnO)-based ultraviolet (UV) detector has been fabricated and its photoresponse is studied in an out-of-plane contact configuration. Porous anodic aluminum oxide (AAO) template-based deposition method is adopted for the aligned and well-separated growth of ZnO nanorods (NRs). Through-hole in silicon (Si) by modified metal assisted chemical etching is used as a window for the electrochemical deposition of ZnO in the template and for out-of-plane electrical contacts during device analysis. The fabricated photodetector shows a fast response under UV (365 nm) light illumination, with rise and decay times of 31 ± 2 ms and 85 ± 3 ms, respectively. This fast response is analysed in terms of vertical growth and the waveguide nature of ZnO NRs embedded in anodic alumina. These results are further supported by a simulation comparing the electric field distribution of ZnO NR embedded in AAO with that of bare ZnO NR.
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Affiliation(s)
- Muni Raj Maurya
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory, Dr K. S. Krishnan Marg, New Delhi 110012, India. Electrical & Electronics Metrology Division, CSIR-National Physical Laboratory, Dr K. S. Krishnan Marg, New Delhi 110012, India
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5
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Bashirpour M, Forouzmehr M, Hosseininejad SE, Kolahdouz M, Neshat M. Improvement of Terahertz Photoconductive Antenna using Optical Antenna Array of ZnO Nanorods. Sci Rep 2019; 9:1414. [PMID: 30723252 PMCID: PMC6363728 DOI: 10.1038/s41598-019-38820-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 01/07/2019] [Indexed: 11/09/2022] Open
Abstract
An efficient terahertz (THz) photoconductive antenna (PCA), as a major constituent for the generation or detection of THz waves, plays an essential role in bridging microwave-to-photonic gaps. Here, we propose an impressive approach comprising the use of arrayed zinc oxide nanorods (ZnO NRs) as an optical nanoantenna over an anti-reflective layer (silicon nitride) in the antenna gap to boost the photocurrent and consequently the THz signal. The numerical approach applied in investigating the optical behavior of the structure, demonstrates a significant field enhancement within the LT-GaAs layer due to the optical antenna performing simultaneously as a concentrator and an antireflector which behaves as a graded-refractive index layer. ZnO NRs have been fabricated on the PCA gap using the hydrothermal method as a simple, low cost and production compatible fabrication method compared to other complex methods used for the optical nanoantennas. Compared to the conventional PCA with a traditional antireflection coating, the measured THz power by time domain spectroscopy (TDS) is increased more than 4 times on average over the 0.1–1.2 THz range.
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Affiliation(s)
- Mohammad Bashirpour
- School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Matin Forouzmehr
- School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Seyed Ehsan Hosseininejad
- School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran.,Department of Electrical Engineering, Yazd University, Yazd, Iran
| | - Mohammadreza Kolahdouz
- School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran.
| | - Mohammad Neshat
- School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran
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6
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Kwon OH, Jang JW, Park SJ, Kim JS, Hong SJ, Jung YS, Yang H, Kim YJ, Cho YS. Plasmonic-Enhanced Luminescence Characteristics of Microscale Phosphor Layers on a ZnO Nanorod-Arrayed Glass Substrate. ACS APPLIED MATERIALS & INTERFACES 2019; 11:1004-1012. [PMID: 30511826 DOI: 10.1021/acsami.8b13767] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We present a planar luminescent layer for glare-free, long-lifespan white light-emitting diodes (LEDs), with attractive light outputs. The novel and facile remote phosphor approach proposed in this work enhances luminescence properties by combining a waveguiding ZnO-based nanostructure with plasmonic Au nanoparticles. The system comprised a microscale yellow phosphor layer that is applied by simple printing onto an Au nanoparticle-dispersed ZnO nanorod array. This architecture resulted in a considerable enhancement in luminous efficacy of approximately 18% because of the combination of waveguide effects from the nanorod structure and plasmonic effects from the Au nanoparticles. Performance was optimized according to the length of the Zn nanorods and the concentration of Au. An optimal efficiency of ∼84.26 lm/W for a silicate phosphor-converted LED was achieved using long ZnO nanorods and an Au concentration of 12.5 ppm. The finite-difference time-domain method was successfully used to verify the luminous efficacy improvements in the Au nanoparticle-intervened nanostructures via the waveguiding and plasmonic effects.
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Affiliation(s)
| | | | | | - Jun Sik Kim
- R&D Center , LG Display Co., Ltd , Paju-si , Gyeonggi-do 10843 , Korea
| | | | | | - Heesun Yang
- Department of Materials Science & Engineering , Hongik University , Seoul 04006 , Korea
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7
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Lee SY, Kim HM, Park J, Kim SK, Youn JR, Song YS. Enhanced Plasmonic Particle Trapping Using a Hybrid Structure of Nanoparticles and Nanorods. ACS APPLIED MATERIALS & INTERFACES 2018; 10:41655-41663. [PMID: 30404444 DOI: 10.1021/acsami.8b14787] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plasmon-enhanced particle trapping was demonstrated using a hybrid structure of nanoparticles and nanorods. In order to intensify localized surface plasmon resonance (LSPR), gold nanoparticles (AuNPs) were deposited on zinc oxide nanorods (ZnONRs). The synergistic effect caused by the hybrid structure was identified experimentally. Numerical analysis revealed that the LSPR-induced photophysical processes such as plasmonic heating and near-field enhancement were improved by the existence of ZnONRs. The role of the ZnONR in enhancing the particle-trapping velocity was explored by examining the scattered electric field, Poynting vector, and temperature gradient over the nanostructures calculated from the simulation. It was found that polystyrene microparticles and Escherichia coli cells were successfully trapped by using the ZnONR/AuNP plasmonic structure. A relatively high dielectric constant and nanorod geometry of ZnO enabled the hybrid substrate to enhance trapping performance, compared with a control case fabricated using only gold nanoislands.
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Affiliation(s)
- So Yun Lee
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Hyung Min Kim
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Jinho Park
- Department of Chemistry , Seoul National University , Seoul 08826 , Republic of Korea
| | - Seong Keun Kim
- Department of Chemistry , Seoul National University , Seoul 08826 , Republic of Korea
| | - Jae Ryoun Youn
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Young Seok Song
- Department of Fiber System Engineering , Dankook University , Yongin , Gyeonggi-do 16890 , Korea
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8
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Ngo TH, Gil B, Shubina TV, Damilano B, Vezian S, Valvin P, Massies J. Enhanced excitonic emission efficiency in porous GaN. Sci Rep 2018; 8:15767. [PMID: 30361633 PMCID: PMC6202416 DOI: 10.1038/s41598-018-34185-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 10/07/2018] [Indexed: 11/29/2022] Open
Abstract
We investigate the optical properties of porous GaN films of different porosities, focusing on the behaviors of the excitonic features in time-integrated and time-resolved photoluminescence. A substantial enhancement of both excitonic emission intensity and recombination rate, along with insignificant intensity weakening under temperature rise, is observed in the porous GaN films. These observations are in line with (i) the local concentration of electric field at GaN nanoparticles and pores due to the depolarization effect, (ii) the efficient light extraction from the nanoparticles. Besides, the porosification enlarges the surface of the air/semiconductor interface, which further promotes the extraction efficiency and suppresses non-radiative recombination channels. Our findings open a way to increasing the emission efficiency of nanophotonic devices based on porous GaN.
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Affiliation(s)
- Thi Huong Ngo
- Laboratoire Charles Coulomb, CNRS and Université de Montpellier, CC074, 34095, Montpellier, Cedex 5, France. .,Faculty of Science and Technology, Meijo University, 1-501 Shiogamaguchi, Tenpaku-ku, Nagoya, 468-8502, Japan.
| | - Bernard Gil
- Laboratoire Charles Coulomb, CNRS and Université de Montpellier, CC074, 34095, Montpellier, Cedex 5, France. .,Ioffe Institute, 194021, St Petersburg, Russia.
| | | | - Benjamin Damilano
- Université Cote d'Azur, Centre de Recherche sur l'Hetero-Epitaxie et ses Applications- CNRS- Rue Bernard Gregory, Sophia, Antipolis, 06560, Valbonne, France
| | - Stéphane Vezian
- Université Cote d'Azur, Centre de Recherche sur l'Hetero-Epitaxie et ses Applications- CNRS- Rue Bernard Gregory, Sophia, Antipolis, 06560, Valbonne, France
| | - Pierre Valvin
- Laboratoire Charles Coulomb, CNRS and Université de Montpellier, CC074, 34095, Montpellier, Cedex 5, France
| | - Jean Massies
- Université Cote d'Azur, Centre de Recherche sur l'Hetero-Epitaxie et ses Applications- CNRS- Rue Bernard Gregory, Sophia, Antipolis, 06560, Valbonne, France
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